Pencil with body of convolutely wound paper



y 1949- K. MILLER 2,469,049

PENCIL WITH BODY OF CONVOLUTELY WOUND PAPER Filed March 11, 1947Patented May 3, 1949 UNITED STATES PATENT OFFICE PENCIL WITH BODY OFCQNVOLUTELY WOUND PAPER Application March 11, 1947, Serial No. 733,735

2 Claims. 1

This invention relates to pencils or marking instruments and, moreparticularly, to a pencil having a core of suitable marking material,such as a graphite composition or crayon commonly known as lead, encasedin a sheath formed of sheet material Wound or coiled around the core.

One of the difiiculties encountered with such a pencil is to obtain acomposition sheath which will have the required transverse strength,will tightly grip the core or lead, and can be readily sharpened by aknife or other sharpening tool.

This invention has for its salient object to provide a pencil having asheath of such composition that it will have the required transversestrength, will tightly grip the core, and can be readily sharpened by aknife or other suitable sharpening tools, such as a rotary sharpeningdevice.

Further objects of the invention will appear from the followingspecification taken in connection with the drawings which form a part ofthis application, and in which Fig. 1 is a perspective view showing ablank adapted for use in forming the pencil embodying the invention;

Fig. 2 is an end elevation of the blank, partially coiled to form asheath; and

Fig. 3 is a transverse sectional elevation, on an enlarged scale, of thepencil embodying the invention.

The pencil is preferably formed from a sheet or strip formed of paperpulp and cut to the desired length and width. Fig. 1 illustratessomewhat diagrammatically a blank ll] of paper formed from paper pulpand it should be noted that the pulp fibers l l have been oriented sothat they are disposed in substantially parallel relation. This isaccomplished and in the paper forming machine, the major portion of thefibers being oriented in substantially parallel relation,

and the paper sheet or strip as it is formed on the Fourdrinier machinetravels in the direction of the arrow X in Fig. 1. The blank N],therefore, is cut transversely of the strip.

This sheet, in order to be suitable for use in forming a pencil sheath,may be treated or aged to partially char the paper. Various methods ofaccomplishing this may be employed, as, for instance, those shown in myPatents Nos. 2,352,444 and 2,375,696. The blank it having the fibers llarranged substantially as shown in Fig. l is wound in any suitablemanner around the core 12 of marking material, such as a graphite core,commonly termed a lead core.

The arrangement of the fibers I I in the manner described disposes themajority of the fibers substantially parallel to the axis of the pencil,thereby giving the desired transverse strength.

This arrangement has a further advantage in that when the paper sheet iswrapped around the core under some tension, as disclosed in my PatentNo. 2,259,959, it is wetted with a suitable adhesive, and whensubsequently drying, a considerably greater shrinkage takes placetransversely than longitudinally, thus obtaining a tight grip on thecore throughout its length, and at the same time the longitudinalshrinkage is not enough to disturb this tight grip in drying.

In order to further facilitate the sharpening of the pencil and toprovide a sheath that can be easily sharpened, the sheet or blank It! isimpregnated with a suitable lubricant which may be applied in anysuitable manner, as by spraying from a nozzle, as shown in Fig. 1. Ifdesired, the lubricant can be added to the pulp solution before thepaper pulp is disposed on the Fourdrinier wire. The lubricant mayconsist of paraflin, oils, greases, waxes, paraffin being preferred.

It will be understood that before the blank is coiled around the corel2, a suitable adhesive is applied, such, for instance, as sodiumsilicate, in order that the successive convolutions may be securedtogether.

Although one specific embodiment of the invention has been particularlyshown and described it will be understood that the invention is capableof modification and that changes in the construction and in thearrangement of the various cooperating parts may be made withoutdcparting from the spirit or scope of the invention, as expressed in thefollowing claims.

What I claim is:

1. A pencil comprising a core of marking material and a sheath enclosingthe core consisting of flexible paper pulp material wound around thecore and having the fibers of the sheet material disposed substantiallyparallel to the longitudinal axis of the sheath, the convolutions beingsecured together by a suitable adhesive, the paper pulp material of saidsheath being impregnated with a lubricant.

2. The method of forming a pencil which consists of winding a sheet ofpaper pulp material, impregnated with a lubricant, into a sheath arounda core of marking material, with the fibers disposed substantiallyparallel to the core axis, and securing successive convolutions by asuitable adhesive.

KAY MILLER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,595,856 Clark Aug. 10, 19262,272,126 Miller May 8, 1945

